Locking ring rolling machine



June 14, 1960 E. c. KRADOSKA 2,940,501

LOCKING RING ROLLING MACHINE Filed Nov. 20, 1957 4 Sheets-Sheet 1 INVEVTOR. EDWARD C. KRADOSKA June 14, 1960 E. c. KRADOSKA 2,940,501

LOCKING RING ROLLING MACHINE Filed Nov. 20, 1957 4 Sheets-Sheet 2 INVEN TOR. EDWARD C KRADOSKA June 14, 1960 c, KRADOSKA 2,940,501

LOCKING RING ROLLING MACHINE Filed Nov. 20, 1957 4 Sheets-Sheet 3 FIG 5 IN V EN TOR. EDWARD C, KRADOS KA ZKW June 14, 1960 E. c. KRADOSKA 2,940,501

LOCKING RING ROLLING MACHINE Filed Nov. 20, 1957 4 Sheets-Sheet 4 FIG 9 FIG. IO

IN VEN TOR. EDWARD C KRADOSKA 2,940,501 LOCKING RING ROLLING-MACHINE Edward C. Kradoska, 1602 lrospect Ave. Melrose Park, Pa.

Filed Nov. 20, 1957, Ser. No. 697,590

3 Claims. (Cl. 153-54) of the head and the rim of the drum together. The locking rings referred to, may be tightened and loosened by means of a built-in cam mechanism or by means of a bolt which engages flanges formed at the ends of the ring. The first mentioned type is known as quick lock ring and the second type mentioned is known as bolt lock ring.

The drums and the locking rings are subjected to rough handling and are quickly dented and otherwise deformed.

Because they are expensive, machinery has beendevised for de-denting and otherwise re-forming the drums in order" to prolong their useful life.

The object of the present invention is to provide an improved apparatus for de-denting and re-forming the locking rings whether they are of 'the'quick lock or of the bolt lock type.

'The full nature of the invention will be"understood from the following specification and the accompanying drawings in which:

Fig. 1 is a diagrammatic plan view of an apparatus embodying the invention, only such parts being shown as are necessary for understanding of the invention.

Fig. 2 is a section on line 22 on Fig. 1.

Fig. 3 is a sectional view taken on line 3-3 of Fig. 2.

Fig. 4 is a sectional view taken on line 4-4 of Fig. 1.

Fig. 5 is a top plan view showing the manner in which the'parts yield in a horizontal direction in the presence of a large lateral deformity in order to prevent damage or breakage.

Fig. 6 is similar to Fig. 5 and shows the position which the parts assume in the absence of a large deformity or when a ring has been re-formed to its original and proper shape.

Fig. 7 is a greatly enlarged, fragmentary sectional view showing how the rolls yield in a vertical direction in the presence of a large vertical deformity or when a double thickness portion of the ring is passing between the rolls.

Fig. 8 is similar to Fig. 7 but shows the position of the rolls in the absence of a large vertical deformity or when a single thickness portion of the ring is passing between the rolls.

Fig. 9 is a top plan view of a quick lock ring.

Fig. 10 is a top plan view of a bolt lock ring.

Fig. 11 is a reduced view, partly in section and partly in elevation, of the forming die which supports the ring to be re-rolled, the same being shown with a bolt lock ring mounted thereon.

Fig. 12 is an enlarged, fragmentary view taken on line 1212 on Fig. 9.

As best shown in Fig. 2, the ring re-rolling apparatus is mounted on front legs 10 and 11 and rear legs 12 and 13, the front legs being somewhat shorter than the rear legs, whereby the apparatus tilts forwardly or toward the operator.

United States Patcnt o 2,940,501 Fatented June z 14, 196,0

Thelegs support the platform 14 on-which is mounted a reversing momma which is energized, in either direction, in theconventional manner. Motor 16 drives :a gear train 18 to rotate shaft 20. Shaft 20projects above upper platform 22 and carries a forming die 24,'the periphery 26 of which supports'tlie ring to be're-rolledin the manner shown i nFigjll. T

The ring to be re-rolled is acted on by two spaced pairs of rolls, one pair being formed of upper and lower rolls 31 and 32, and the other pair being formed of upper and low'errolls 33 and 34. The "upper rolls 31 and 33 are carried by stub shafts 36 and 37 which are carried by upper arms 38 and 39'and the lower rolls 32. and 34 are carried by stub shafts40 and 41 which are'carriedby lower arms 42 and 43. The upper and lower' arms referred to are pivoted at 44 and 45' to connecting straps 46 and are biased toward each other by adjustable springs 48 and 49 which are carried by rods 50and 51. By adjusting the tension of springs 48 and 49, the pressure. of the rolls against the work piece can be controlled. It is tobe noted that the pressure of springs 48 and 49 is always such as to permit upper arms 38 and 39 and lower arms 42 and 43 to yield and move to the broken line positions of Fig. 2 whenever the resistance encountered exceeds a given value, so as to guard against damagenor breakage which can occur if the arms' were rigidly mounted.

Shafts 50 and 51 which carry the upper and lower-arms 38 and 39 and 42 and 43, respectively, are carried by a cross member 56 which is pivotally carried by the piston 58 of an air cylinder 60. Cross member 56 is normally retracted to the position shown in Figs. 1 and 2 by springs 62 and is moved toward die 24 or to the position shown in Figs. 5 and 6 by admission of air into cylinderg60-by manipulation of foot valve 64 which is only shown in Fig. 1. Cross member 56 is guided in its movement by means of a pin 68 which engages a slot 70 in a plate 72 which is carried by a portion 74 of the frame of the machine.

The operation is as follows:

The ring to be re-rolled, be it of the bolt lock type shown in Figs. 10 and 11, or of the quick lock type, shown in Fig. 9, is clamped on the periphery 26 of die 24, motor 16 is energized and air is admitted into air cylinder 60. The operator, using a switch 76, which is only shown in Fig. 1, causes the motor, and, hence, the die to rotate in opposite directions so as to roll the body of the ring, but to prevent lugs 78 of the rings from passing between the upper and lower rolls. If a ring is badly deformed, as exaggeratedly shown in Fig. 5, plate 56 and the rolls carried thereby will tilt, as diagrammatically shown in Fig. 5 so as to prevent damage or breakage and to permit gradual reforming of the ring. In the absence of a large deformity, or after the ring has been re-formed into its proper shape, the parts will assume the position shown in Fig. 6. In the presence of a small deformity, or of a single thickness portion of the ring, the rolls will assume the position ilustrated in Fig. 8 in which the upper and lower rolls are not spread far apart. In the presence of a large deformity, or when a double thickness portion of the ring is encountered, the rolls will be spread further apart, as shown in Fig. 7. It will be understood that the tension of springs 48 and 49 is adjusted according to the work on which the machine is to be used.

In practice, I prefer to exert greater spring pressure on one pair of rolls than on the other and to orient the reciprocal rotation of the ring so that it passes between the rolls subjected to the lesser pressure before it passes between the rolls subjected to the greater pressure. For example, I can exert greater spring pressure on rolls 31 and 32 than on rolls 33 and 34, and I place the ring on the die in such a position and I energize the motor so as ts rotatelina direction :to cause the ring to pass between molls 33 and 34 before it passes between rolls 31 and 32.

' In this way I take advantage of the fact that it takes less force to bend a rod over a -large radius than over a small iradius; Inlothen-words; when a .dent "or bulge is large,

:itn's' more easilyrreformed'than =whenit-is small, and by 1 :the' arrangement described, the large bulges are first actedonby thelmoreyielding rolls 33 and 3,4 and, when :the' :bulges"-ha\ e-1been somewhat reduced and are more --i'esi's'tant,-they rareza'cted on by the less yielding rolls 31 and 32 which complete the elimination .of the bulges.

V :From-the foregoing it will :be seen thatgthe re-rolling Lmechanism" has. a floating mounting so as to have a limited rotation aboutthe vertical axis offpins68 which is parallel v to the axis of the worl; :piece; that the rolls. are mounted -'-.{for limited werncal mdvemeritinthedirection of their verticall-axs; that one'pairofrollsis 'subjectedto greater compressive ;p'ressure,i;and iyields' less readily than ,the "otherl-pairand that thfijZiIlg-tdbGIC-Iblifidi passes between :.-the. rnore.lreadilyvyieldinguroll .heforeitgpasses between l the less rea l y *y fi --What-I.claim is: 7

. 1. A' machine for reforming 1 l 'lwckmg ring ,thetype used for clampingwa closure to theiopen end 1 iota-drum;- said. machine including a die rotatable about avrtical axis and on which'thering to be reformed is :-clamped,"a supporting member, means mounting said supsportingmember'for rotation about a vertical axis, a'pair of horizontally spaced rollers carried bygsaidsupporting niemberandr-rotatable about vertical axes, neans. yieldably biasing said supporting member to apo sition in which the iaxesrof the rotation ofsaigl rollers are equidistant from the axis of rotation of said di e andfifor y 1d y urging sa ppq i the diregtiqu si s i di to bring vsaid rollersinto contact with a ring clamped on said;die-w ith.a force su ificient to deform thematerial of id'ring; e n in of i ls lrin s bQ P 'w Qhv- 'h i V a 51116 presence of resistance 7 of a predetermined value, said 940,501 7 K 1 r r V,

springs will yield and said supporting member tilts to 'reduce the pressure with which said rollers contact said ring. a r

2. The structure recited in claim-1 in which said ring 5 has at least one projection extending beyond its external periphery and in which said die is rotated in opposite directions and to an extent less than 360? in each direction to prevent the passage (of said projection under said rollers. V a a l v 3. A machine for-reforming a dented locking ring of the type vused forlclampinga closure to the open end of a drum, said machine *includingadie rotatable about a vertical axes -a nd onwhich thering to .be reformed is I clamped," 'a' supportingmeniber, rn eans mounting said supporting member for rotation .ahuum vertical axis, a

first pair of rollers carried by said supporting member and rotatable about a common vertical axis, yielding means normally biasing said rollers toward each other a force slig htly greater than the force needed to deform sthe rnatefrial of said ring, a second pair of rollers :arried by support in horiiont ally spaced relation to j s aid first'pair of rollers and Lirotatable about a common verse-( 1' axis, yielding means. biasing said firstand'second ne ller wa d ea oth w t a fo c d a :filrs order whereby, inthefpresence of resistance intfi txcess' of said iirst order, the ro Ilers fQrniing said 'pairswill s a rate, actuating means for yieldably urgingsaidisupp ring member and said -pairs of rollers toward" said' die to :bring'said vpairs of rollersinto contact withl-saidjring .with a.-forc'e of a second ordersl fi qientto detolgm said nng. v11,.

References Gitedin the file of this-patent UNITED STATES PATENT-S 7 4 91 3 g t .--r- 2,160,866 Horthersall June 6,"1939 '2,6 17,466

Kradoska 1A1 

